THE CEPHALOPODA. 
217 
RANGE OP THE GENERA OP TPIE POSSIL CEPHALOPODA IN 
GEOLOGICAL TIME/ 
Drawn up by the Eet. T. WiLTsniRE, M.A., F.Gr.S., ix 1867. See page 203. 
V* 
o 
3 
O 
0^ 
o 
nifer 
CS 
u 
X 
OJ 
03 
.£ 
o 
_s 
=3 
O 

r-\ 
M 

1 A rcynnaiitfi 
X» Xil ^ VJllCt LI LCI • o 

... 
ii. JjIlUUlULCLllIlio 
... 
R Plpsintftiit.his 
(J • J. i \jO IV-^ LVJ L* U Ai 1 O • 
A. firvrm ocf TPr^ n PC 
't. V_/[liiIialSlil CUIICS . 
... 
U. XtJU-UUlJolS . 
<. JT liy llULcULUits • 
. . . 
a . <> 
R Rplnffiiitlns 
* 
* 
1 n T ,Ar\f r^fpnt ni CI 
... 
-L J. • JJACfc • ■ • 
1 8 Eelontera 
•* 
1 ZL PTpllPPTflS! 
XlI. O nil Ulll UOti d 
1 fi Rplpmnitps 
J. \J « JL-'Lyll.^i.LLill LOO • . 
• • K 
* 
X / . JjolclILlllLcJla 
* 
18. Belemnoteuthis . 
19. Conoteuthis 
20. Xiphoteuthis 
* 
21. Nautilus . . 
* 
22. Discoceras . 
23. Opliidioceras 
24. Gyroceras . 
* 
25. Cyrtoceras . 
* 
26. Cyrtocerina 
27. Oncoceras . 
* 
28. Streptoceras 
29. Piloceras 
30. Lituites 
1 
1 The stars opposite a genus in one or more of the columns show that the genus existed in the 
geological period referred to in the column or columns. 
2 The Jurassic formation includes the Oolite and the Lias. 
29 
